Nighttime construction activities will take place on Friday, July 21, causing lane closures and detours on the Dulles Toll Road (DTR), Dulles International Airport Access Highway (DIAAH) and Dulles Greenway.

See below for more detailed information. All work is weather permitting.

Drivers are asked to use caution, remain attentive to all signage, barricades and speed limits, and obey all police and flagger instructions.

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Dulles Toll Road (DTR) West

When: Friday, July 21, 10 p.m. to 3 a.m.

What: Slow roll

Where: From mile marker 2.4 (from 1/10 mile after the Centreville Road bridge) and continuing along the ramp to the westbound Dulles Greenway